> it leads to exploits or errors You are blaming implementation failures on the language design. That's kind of my whole gripe. Instead of wasting cycles on in

> it leads to exploits or errors You are blaming implementation failures on the language design. That's kind of my whole gripe. Instead of wasting cycles on inventing new languages, I wish we'd pool resources into fixing libyaml. > most stuff I've seen in the wild doesn't use the exotic features anyway Mostly due to lack of awareness. Ruby, Python, JavaScript Rust, Java, etc. all allow mostly arbitrary objects for keys. It's only confusing if you conflate dictionaries/maps for objects. In the scientific computing community, it's not unheard of to see lists as keys in YAML documents, which is really convenient if that serializes to exactly the data model you're working.